🐛 备份时忽略权限不足的文件

SQLBackupToCOS/BackupService.cs

@@ -74,10 +74,10 @@ public class BackupService(ILogger<BackupService> logger, IConfiguration config,
 
                 using var proc = Process.Start(psi) ?? throw new InvalidOperationException("Failed to start mysqldump");
                 await using var fs = new FileStream(dumpFile, FileMode.CreateNew, FileAccess.Write, FileShare.None);
-                
+
                 var copyTask = proc.StandardOutput.BaseStream.CopyToAsync(fs, 81920, ct);
                 var stderrTask = ConsumeStreamToLoggerAsync(proc.StandardError, _logger, ct);
-                
+
                 await Task.WhenAll(copyTask, stderrTask);
                 await proc.WaitForExitAsync(ct);
 
@@ -92,9 +92,9 @@ public class BackupService(ILogger<BackupService> logger, IConfiguration config,
             }
 
             _logger.LogInformation("Compressing backup directory to {File}", finalDump);
-            
+
             await CompressDirectoryAsync([dumpDir, extraDir], finalDump, ct);
-            
+
             Directory.Delete(dumpDir, recursive: true);
             _logger.LogInformation("Backup completed: {File}", finalDump);
 
@@ -111,8 +111,9 @@ public class BackupService(ILogger<BackupService> logger, IConfiguration config,
     {
         // 构建 tar 命令参数
         // tar -czf output.tar.gz -C /parent1 folder1 -C /parent2 folder2
-        var args = new StringBuilder($"-czf {targetFile}");
-        
+        // --ignore-failed-read: 忽略无法读取的文件，继续备份
+        var args = new StringBuilder($"-czf {targetFile} --ignore-failed-read");
+
         foreach (var sourceDir in sourceDirs)
         {
             if (Directory.Exists(sourceDir))
@@ -143,10 +144,18 @@ public class BackupService(ILogger<BackupService> logger, IConfiguration config,
         await stderrTask;
         await proc.WaitForExitAsync(ct);
 
-        if (proc.ExitCode != 0)
+        // tar 返回码说明：
+        // 0 = 成功
+        // 1 = 一些文件有问题，但备份继续（使用 --ignore-failed-read 时）
+        // 2 = 致命错误
+        if (proc.ExitCode > 1)
         {
             throw new InvalidOperationException($"tar exited with code {proc.ExitCode}");
         }
+        else if (proc.ExitCode == 1)
+        {
+            _logger.LogWarning("tar completed with warnings (exit code 1), some files may have been skipped");
+        }
     }
 
     private async Task ConsumeStreamToLoggerAsync(StreamReader err, ILogger log, CancellationToken ct)